Saw-mi-ll carriage



(No Model.)

J. A. HAUSBR.

SAW MILL CARRIAGE.

N0. sgtg m. Patented Oct. 16, 1888.

UNITE STATES JOHN A. HAUSER, OF MONTGOMERY, ALABAMA, ASSIGNOR OF ONE-HALF TO J. A. YANOEY, OF RICHMOND, VIRGINIA.

SAVV-MlLL CARRIAGE.

SPECIFICATION forming part of Letters Patent No. 391,046, dated October 16, 1888.

Application filed January 26, 1888. Serial No. 261,919. (No model.)

To all whom it may concern:

Be it known that I, JOHN A. HAUSER, a citizen of the United States, residing at Montgomery, in the county of Montgomery and State of Alabama, have invented certain new and useful Improvements in Saw-Mill Oarriages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in saw-mill carriages.

Hitherto carriages 0f the above character have been mounted on rollers, the latter having been either journaled in boxes secured to the carriage and adapted to run on a track or tracks laid on the floor, or the boxes have been secured to thefloor and the tracks to the carriage. The rollers or wheels have been either attached firmly to the axles and the axles journaled' in boxes, or the axles have been socured to the carriage and the wheels loosely mounted on the axle. By the above construction the wheels have been required to travel bodily a distance equal to the travel of the carriage, and when the carriage has been operated at such a speed as to economize time it has been necessary to keep the journals well lubricated to prevent heating, since the friction is great because of the great weight sus tained by the carriage. Moreover, the greatest care has not sufficed to prevent the journal and boxes on the front of the carriage, or side toward the saw, (the side which sustains the greater part of the weight of the log,) from wearing more rapidly than those on the opposite side of the carriage, and this has given rise to irregular cuts, and hence to an inferior quality of lumber.

The object of my present invention is to provide a saw-mill carriage which may be run at the desired speed with a minimum amount of friction, and in which there will be no journals to lubricate, and which will hold the log truly up to the saw.

A further object is to provide a carriage of the above character in which the slight wear will be evenly distributed, and in which the wear may be taken up with ease and dispatch.

With these ends in View my invention consists in certain features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is aview of the carriage in front side elevation. Fig. 2 is a top plan view; Fig. 3, a vertical cross-section on an enlarged scale, and Fig. 4 is a modification.

A represents a floor, and B represents tracks laid on the floor at the proper distance apart.

The-carriage is constructed as follows: A framework of suitable strength, consisting preferably of a pair of side rails, 0, connected by girders c,located at suitable intervals apart, is provided with several bearing-brackets, D, on which the log is intended to rest and to be slid laterally toward the saw. The side rails, O, are provided along their under faces with shoes (preferably metal shoes) d, which serve as hearings on the roller-axles. Each pair of rollers E is connected by an axle, c, and the faces of the rollers (one or both) are grooved to partially embrace the track B to hold them in position thereon. The rollers or wheels are secured firmly to the axle and caused to rotate therewith. The rails O are preferably rabbeted out, as shown at c, to receive the upper portions of the wheels or rollers. The shoes onthe under faces of the side rails are intended to rest directly on the rounded portions of the axle just inside the rollers, and to prevent the lateral displacement of the rails on the axle collars F are secured on said axle. The collars F are preferably made adjustable on the axle, and between the collars and the shoes the washers f are inserted. The washers f may be loosely secured on the axle, and the faces of the washers are preferably beveled, as shown at f, to correspond with the beveled edges of the shoes d.

In order to prevent the different pairs of rollers from cramping on the tracks by any slight skewing of the same, I provide a truck frame consisting of a pair of rails, G, to loosely embrace the axles of the rollers on opposite sides of the central portions of the same, which rails serve to hold the several axles squarely up to their work and at the proper distances from one another.

The axles are conveniently provided with shoulders g, at suitable distances on opposite sides of their centers, to form abutments to hold the rails G the proper distance apart, and the collars F serve to limit outward lateral movements of the rails G on the axles.

It is evident that other well-known devices than the shoulders on the axles might be employed as abutmentssuch, for example, as adjustable collars.

H represents the draft-beam secured to the under side of the carriage-frame, and provided, as is usual, with a rack-bar face adapted to mesh with a pinion, I, on a driveshaft, K.

L represents the saw jonrnaled in suitable bearings, Z, and located in position to engage the log at theside of the carriage.

As the carriage is madeto travel along the track, its hearings on the axles will cause the same to rotate, and hence the wheels to rotate on the tracks; but there will be no sliding friction whatever between the carriage with its weight and the axles or between the axles and the Wheels, and because of the advance of the carriage over the axle simultaneously with the advance of the axles along the track the wheels and axles will travel less distance than when journaled to move the log a given distance. There will be no heating ofjournals, no oiling will be required, and no wear, to be considered, will take place, with the exception of such slight wear as may take place between the faces of the washers and the edges of the shoes. This, however slight it maybe, may be readily taken up by the adjustment of the collars F on the axles, if found necessary. The-result will be that the log will be carried truly up'to the saw without the slightest irregularity on the part of the carriage, whereby the lumber will be regularly cut, and hence more valuable, and the saw will run easier, saving wear upon it and upon its journals, and indirectly saving power.

The modification, Fig. 4, shows the construc tion Where the wheels or rollers are independent of one another. In this case the side rails, O, are provided with grooves G in their under faces, to receive the upper portions of the Wheels or rollers, and the shoe d is divided longitudinally, one half resting upon the rolleraxle on each side of the roller.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts without departing from the spirit and scope of my invention; hence I do not wish to limit myself strictly to the construction herein set forth; but,

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a saw-mill carriage, the combination, with rollers secured to turn with their axles, of mechanism arranged to hold the rollers apart and their axles parallel, and a log-supporting frame resting on the axles and having a free longitudinal movement thereon throughout its stroke, in the manner and for the purpose set forth.

2. In a saw-mill carriage, the combination,

with several pairs of rollers secured to rotate with their axles, of a carriage-frame resting in free longitudinal adjustment on the axles, and

adjustable collars on the axles to prevent lat eral displacement of the carriage-frame, substantially as set forth.

3. In a saw-mill carriage, the combination, with several pairs of rollers secured to rotate with their axles, ofa carriageframe supported on the axles and free to move longitudinally thereon, bearing-shoes on the carriage-frame, adjustable collars on the axles, and washers interposed between the collars and the shoes, substantially as set forth.

4. In a saw-mill carriage, the combination, with several pairs of rollers secured to rotate with their axles and connected by side rails which loosely embrace the axles, of a carriageframe resting freely on the axles and actuating mechanism connected directly with the carriage-frame, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN A. HAUSER.

Witnesses:

B. W. JoHNs'roN, E. SMITH. 

